US20180297823A1 - Hydraulic rotational drive - Google Patents
Hydraulic rotational drive Download PDFInfo
- Publication number
- US20180297823A1 US20180297823A1 US15/950,737 US201815950737A US2018297823A1 US 20180297823 A1 US20180297823 A1 US 20180297823A1 US 201815950737 A US201815950737 A US 201815950737A US 2018297823 A1 US2018297823 A1 US 2018297823A1
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- US
- United States
- Prior art keywords
- shaft
- rotational drive
- rotary encoder
- recess
- shaft bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G23/00—Forestry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
- B66C3/005—Grab supports, e.g. articulations; Oscillation dampers; Orientation
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D65/00—Grain-crop lifters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/54—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using cranes for self-loading or self-unloading
- B60P1/5404—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using cranes for self-loading or self-unloading with a fixed base
- B60P1/5423—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using cranes for self-loading or self-unloading with a fixed base attached to the loading platform or similar
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/46—Position indicators for suspended loads or for crane elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/42—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
- B66C23/86—Slewing gear hydraulically actuated
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
- E02F3/3681—Rotators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
Definitions
- the invention relates to a hydraulic rotational drive with the features of the preamble of claim 1 .
- a rotational drive of the general kind is known for example from EP 2460758 A1.
- WO 2016/099372 A1 shows a rotational drive foreign to the classification as set forth, which comprises a device for determining the absolute angular position of the rotational drive, wherein the device is provided in the form of a magnetic ring encircling the rotational drive and a corresponding sensor. Therein, the rotational drive pierces through the device for determining the angular position. By way of such a concentric arrangement the device is not positioned in the middle and not centrally in the rotational drive.
- the object of the invention is to specify an improved rotational drive in which the previously mentioned disadvantages do not arise.
- the hydraulic rotational drive for rotating load-handling equipment relative to a crane arm also has, firstly, a shaft which itself in turn has first securing means for connecting the shaft to the load-handling equipment or the crane arm. Furthermore, a shaft bearing is provided, which has second securing means for connecting the shaft bearing to the crane arm or the load-handling equipment.
- vanes arranged in the shaft are provided which can be acted on by oil via an oil feed and an oil discharge for the transmission of a torque to the shaft.
- the hydraulic rotational drive can in general be driven via hydraulic equipment, which usually leads from a crane arm to the rotational drive.
- the hydraulic rotational drive according to the invention additionally has a rotary encoder, which serves to detect the angular position of the shaft relative to the shaft bearing.
- the angular position of the rotational drive and optionally of load-handling equipment secured to the latter can thus be detected simply and precisely.
- a rotary encoder also called a shaft encoder
- a mechanical or electrical sensor for the detection of an angle of rotation.
- Such a sensor can have a rotor and a stator and can generate and output an analogue and/or digital output signal, which is proportional to an angular position of the rotor relative to the stator.
- the rotary encoder can thereby be arranged in an area protected by the shaft or the shaft bearing and thus damage to the rotary encoder due to external mechanical action can be avoided.
- An at least partial arrangement of the rotary encoder in the shaft or in the shaft bearing can also enable a compact design of the rotational drive.
- the at least one recess can be provided in the middle in the shaft and/or in the shaft bearing.
- the rotary encoder can thus be mounted in the middle and centrally in the shaft and/or in the shaft bearing. It can thereby be avoided that the rotary encoder is for example pierced through by the shaft of the rotational drive. Maintenance and mounting of the rotary encoder can thereby be facilitated.
- the rotational drive can have a sliding contact device, which is electrically contacted by a current supply line and a current discharge line.
- An electrical consumer load such as electrically operated load-handling equipment or an electrically operated implement for example, arranged on the rotational drive can thereby be supplied with electrical energy.
- the sliding contact device can also serve for the rotary feedthrough of signal lines.
- the rotary encoder and the sliding contact device can be formed as a combined structural unit.
- a compact design can thereby be achieved, which can be simply arranged in or on the rotational drive.
- first recess to be provided in the shaft for the at least partial arrangement of the rotary encoder or of the sliding contact device and for a second recess to be provided in the shaft bearing for the at least partial arrangement of the rotary encoder or of the sliding contact device.
- the rotary encoder can be arranged at least partially in the second recess and the sliding contact device can be arranged at least partially in the first recess. The reverse is also conceivable.
- the at least one recess can be arranged on an end of the shaft facing towards or facing away from the crane arm.
- the at least one recess can be realized, for example, as a cavity introduced axially into the material of one of the end faces of the shaft.
- the rotary encoder and/or the sliding contact device can be substantially completely received in the at least one recess.
- a space-saving arrangement of the rotary encoder or of the sliding contact device inside the rotational drive and good protection against external mechanical influences can thereby be achieved.
- the transmission of the angular position detected by the rotary encoder to a detection device can, in principle, be possible for the transmission of the angular position detected by the rotary encoder to a detection device to be effected via cables or wirelessly.
- the rotary encoder can optionally also be supplied with electricity via cables or wirelessly (for example inductively).
- the current supply line to the sliding contact device can run substantially axially in the shaft and/or to run substantially radially in the shaft bearing, or vice versa.
- the current supply line thereof can run radially (i.e. laterally for example) or axially (i.e. from above for example) in the area of the shaft bearing.
- the current supply line thereof can run radially or axially in the area of the shaft bearing and run axially (i.e. along the longitudinal extent of the shaft for example) or radially in the shaft itself.
- the current supply line to the sliding contact device can run substantially axially and/or radially in the rotary encoder.
- the current supply line to the sliding contact device can cross the rotary encoder, wherein this can be effected in the axial and/or radial direction.
- the current discharge line from the sliding contact device can be formed at the end of the rotational drive facing towards the load-handling equipment and preferably to lead away from the rotational drive laterally.
- the lateral current discharge line from the sliding contact device can lead away substantially radially or to run diagonally in the direction of the end of the rotational drive facing towards the load-handling equipment.
- the shaft is formed as a rotor and the shaft bearing is formed as a stator.
- the shaft bearing can thus be formed as non-rotatable relative to the crane arm, and the shaft, and optionally load-handling equipment arranged thereon, can be rotated relative to the fixed shaft bearing.
- At least one part of the rotary encoder can be secured to the shaft bearing and at least one part of the rotary encoder to be secured to the shaft.
- one part of the rotary encoder can be fixed relative to the shaft bearing and one part of the rotary encoder can be fixed relative to the shaft.
- Protection is also sought for a crane with a hydraulic rotational drive as previously described for rotating load-handling equipment relative to a crane arm, wherein the crane arm is connected to the second securing means of the hydraulic rotational drive.
- Protection is also sought for a harvester, also called a timber harvester, forest harvester or crane harvester, with a crane as previously described.
- FIG. 1 a sectional representation of a first embodiment of a rotational drive
- FIG. 2 a further sectional representation of the embodiment of the rotational drive of FIG. 1 ,
- FIG. 3 a sectional representation of a second embodiment of a rotational drive
- FIG. 4 a sectional representation of a third embodiment of a rotational drive
- FIG. 5 a sectional representation of a fourth embodiment of a rotational drive
- FIG. 6 a sectional representation of a fifth embodiment of a rotational drive
- FIG. 7 a harvester with a rotational drive
- FIG. 8 a side view of a crane
- FIG. 9 a side view of a vehicle with a crane
- FIG. 10 a sectional representation of a sixth embodiment of a rotational drive.
- FIG. 1 A section through a first embodiment of a rotational drive 1 is shown in FIG. 1 .
- a rotatable shaft 4 which has vanes 7 which can be acted on by hydraulic oil to drive the shaft 4 , is arranged in the shaft bearing 18 .
- the shaft 7 projects out of the shaft bearing 18 at a lower end 15 of the rotational drive 1 .
- first recess 9 there is provided in the shaft bearing 18 a first recess 9 , in which a rotary encoder 8 is arranged.
- the rotary encoder 8 is arranged substantially completely in the first recess 9 .
- the first recess 9 is formed substantially between the lug-type second securing means 6 .
- a second recess 10 is introduced, in which a sliding contact device 11 is arranged.
- the sliding contact device 11 is arranged substantially completely in the second recess 10 .
- corresponding recesses are provided in the shaft bearing 18 as well as in the shaft 4 .
- a recess in the form of the cable duct 20 can be seen in the shaft 4 , which, as represented, runs at least in sections substantially axially in the shaft 4 .
- a detection device 14 for the detection of the sensor signals output by the rotary encoder 8 is represented schematically in FIG. 1 .
- the communication between the rotary encoder 8 and the detection device 14 can be effected via cables over a signal line 22 and/or wirelessly via a radio link 23 (such as for instance via Bluetooth, via a radio link according to a standard from the IEEE-802.11 family, or similar).
- the rotary encoder 8 and the detection device 14 can have corresponding radio modules.
- FIGS. 2 to 6 further embodiments of the rotational drive 1 are shown, wherein analogous to FIG. 1 in each case the rotary encoder 8 is arranged in a recess 9 in the shaft 18 .
- FIG. 2 A further sectional representation of the embodiment of the rotational drive 1 shown in FIG. 1 is shown in FIG. 2 .
- the section plane of the representation shown in FIG. 2 is running substantially rotated by 90° compared with FIG. 1 .
- the recess in the form of the cable duct 19 in the shaft bearing 18 which, as represented, runs substantially radially in the shaft bearing 18 , can thereby be seen.
- FIG. 3 A second embodiment of a rotational drive 1 is shown in FIG. 3 .
- the shaft bearing 18 again has a first recess 9 , in which a rotary encoder 8 is arranged.
- the shaft 4 At its end facing towards the second securing means 6 , the shaft 4 has a second recess 10 , in which a sliding contact device 11 is arranged.
- the cable duct 19 runs substantially radially in the shaft bearing 18 and also leads substantially radially into the rotary encoder 8 .
- the axial cable duct 20 which also leads into the rotary encoder 8 axially coming from the shaft 4 , runs in the shaft 4 .
- the current supply line 12 to the sliding contact device 11 thus runs substantially radially in the shaft bearing 18 and in some sections radially and in some sections axially in the rotary encoder 8 .
- the current discharge line 13 runs substantially axially in the cable duct 20 of the shaft 4 .
- a part of load-handling equipment 2 secured via first securing means 5 is shown (see also FIG. 7 in this regard).
- the current discharge line 13 exits the (lower as represented) end of the shaft 4 facing towards the first securing means 5 substantially axially.
- FIG. 4 A third embodiment of a rotational drive 1 is shown in FIG. 4 .
- the shaft bearing 18 again has a first recess 9 , in which a rotary encoder 8 is arranged.
- the shaft 4 has a second recess 10 , in which a sliding contact device 11 is arranged.
- FIG. 4 further shows that the current supply line 12 of the sliding contact device 11 runs substantially radially in the shaft bearing 18 and furthermore crosses the rotary encoder 8 axially through a corresponding axial feedthrough 21 .
- the current discharge line 13 of the sliding contact device 11 runs, as represented, substantially axially in the shaft 4 in the cable duct 20 .
- the current discharge line 13 exits the end of the shaft 4 facing towards the first securing means 5 substantially axially.
- FIG. 5 a fourth embodiment of a rotational drive 1 is shown, which differs from the embodiment shown in FIG. 3 substantially in that, at an end facing away from the second securing means 6 and facing towards the first securing means 5 , the shaft 4 has a second recess 10 , in which the sliding contact device 11 is arranged.
- the rotary encoder 8 is again arranged in the first recess 9 of the shaft bearing 18 .
- the cable duct 19 runs substantially radially in the shaft bearing 18 and also leads substantially radially into the rotary encoder 8 .
- the axial cable duct 20 which also leads into the rotary encoder 8 axially coming from the shaft 4 , runs in the shaft 4 .
- the current supply line 12 to the sliding contact device 11 thus runs radially in the shaft bearing 18 and in some sections radially and in some sections axially in the rotary encoder 8 .
- the current supply line 12 also runs axially in the cable duct 20 of the shaft 4 .
- the current discharge line 13 exits the end of the shaft 4 facing towards the first securing means 5 substantially axially.
- FIG. 6 a fifth embodiment of a rotational drive 1 is shown, which differs from the embodiment shown in FIG. 4 substantially in that, at an end facing away from the second securing means 6 and facing towards the first securing means 5 , the shaft 4 has a second recess 10 , in which the sliding contact device 11 is arranged.
- the rotary encoder 8 has a radial feedthrough 21 .
- the current supply line 12 to the sliding contact device 11 coming from the cable duct 19 running substantially radially through the shaft bearing 18 , runs axially through the rotary encoder 8 and runs through the cable duct 20 running substantially axially through the shaft 4 to the sliding contact device 11 arranged, as represented, at the lower end of the shaft 4 .
- the current discharge line 13 exits the end of the shaft 4 facing towards the first securing means 5 substantially axially.
- FIG. 7 shows a side view of a harvester 17 , also called timber harvester, forest harvester or crane harvester.
- the harvester 17 has a crane 16 with an external crane arm 3 .
- a rotational drive 1 is arranged, to which load-handling equipment 2 is secured. Through the hydraulic rotational drive 1 , the load-handling equipment 2 can be rotated relative to the crane arm 3 .
- FIG. 8 a side view of a further embodiment of a crane 16 is shown, wherein structurally and functionally similar elements have the same reference numbers as in the embodiment shown previously.
- load-handling equipment 2 formed as a grapple is arranged on a telescopic crane arm 3 via a rotational drive 1 .
- FIG. 9 a vehicle 24 with a further embodiment of a crane 16 formed as a loading crane is shown, wherein structurally and functionally similar elements have the same reference numbers as in the embodiments shown previously.
- Load-handling equipment 2 formed as a grapple is arranged, via a rotational drive 1 , on a crane arm 3 , formed as an articulated attachment arm, of the crane 16 arranged on the vehicle 24 .
- FIG. 10 a section through a sixth embodiment of a rotational drive 1 is shown.
- the first recess 9 is provided in the shaft 4 , in which the rotary encoder 8 is arranged.
- the first recess 9 is provided at an (upper as represented) end of the shaft 4 facing towards the second securing means 6 .
- the rotary encoder 8 is provided substantially completely in the first recess 9 .
- the second recess 10 is provided in the shaft 4 , in which the sliding contact device 11 arranged.
- the sliding contact device 11 is provided substantially completely in the second recess 10 .
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Abstract
Description
- The invention relates to a hydraulic rotational drive with the features of the preamble of
claim 1. - In generic rotational drives, such as are used for example in cranes for the rotatable installation of load-handling equipment, the detection of the angular position of the rotational drive often presents difficulties. The angular position of the rotational drive has to be effected visually by a user, for example, which can also require a clear view of the rotational drive or free access to the rotational drive. This can have a negative effect on the process of installing load-handling equipment on the rotational drive as well as on the operation of load-handling equipment installed on a crane via a conventional rotational drive.
- A rotational drive of the general kind is known for example from EP 2460758 A1.
- WO 2016/099372 A1 shows a rotational drive foreign to the classification as set forth, which comprises a device for determining the absolute angular position of the rotational drive, wherein the device is provided in the form of a magnetic ring encircling the rotational drive and a corresponding sensor. Therein, the rotational drive pierces through the device for determining the angular position. By way of such a concentric arrangement the device is not positioned in the middle and not centrally in the rotational drive.
- The object of the invention is to specify an improved rotational drive in which the previously mentioned disadvantages do not arise.
- This object is achieved by a rotational drive with the features of
claim 1. Advantageous embodiments of the invention are defined in the dependent claims. - As in the case of a generic rotational drive, for rotating load-handling equipment relative to a crane arm the hydraulic rotational drive according to the invention also has, firstly, a shaft which itself in turn has first securing means for connecting the shaft to the load-handling equipment or the crane arm. Furthermore, a shaft bearing is provided, which has second securing means for connecting the shaft bearing to the crane arm or the load-handling equipment. For driving the rotational drive, vanes arranged in the shaft are provided which can be acted on by oil via an oil feed and an oil discharge for the transmission of a torque to the shaft. The hydraulic rotational drive can in general be driven via hydraulic equipment, which usually leads from a crane arm to the rotational drive.
- In contrast to hydraulic rotational drives known in the state of the art, the hydraulic rotational drive according to the invention additionally has a rotary encoder, which serves to detect the angular position of the shaft relative to the shaft bearing. The angular position of the rotational drive and optionally of load-handling equipment secured to the latter can thus be detected simply and precisely.
- By a rotary encoder, also called a shaft encoder, can be meant a mechanical or electrical sensor for the detection of an angle of rotation. Such a sensor can have a rotor and a stator and can generate and output an analogue and/or digital output signal, which is proportional to an angular position of the rotor relative to the stator.
- It is envisioned for there to be provided in the shaft and/or in the shaft bearing at least one recess, in which the rotary encoder is at least partially received. The rotary encoder can thereby be arranged in an area protected by the shaft or the shaft bearing and thus damage to the rotary encoder due to external mechanical action can be avoided. An at least partial arrangement of the rotary encoder in the shaft or in the shaft bearing can also enable a compact design of the rotational drive.
- Therein, the at least one recess can be provided in the middle in the shaft and/or in the shaft bearing. The rotary encoder can thus be mounted in the middle and centrally in the shaft and/or in the shaft bearing. It can thereby be avoided that the rotary encoder is for example pierced through by the shaft of the rotational drive. Maintenance and mounting of the rotary encoder can thereby be facilitated.
- It can be advantageous for the rotational drive to have a sliding contact device, which is electrically contacted by a current supply line and a current discharge line. An electrical consumer load, such as electrically operated load-handling equipment or an electrically operated implement for example, arranged on the rotational drive can thereby be supplied with electrical energy. The sliding contact device can also serve for the rotary feedthrough of signal lines.
- It can be advantageous for the rotary encoder and the sliding contact device to be formed as a combined structural unit. A compact design can thereby be achieved, which can be simply arranged in or on the rotational drive.
- It can furthermore be advantageous for a first recess to be provided in the shaft for the at least partial arrangement of the rotary encoder or of the sliding contact device and for a second recess to be provided in the shaft bearing for the at least partial arrangement of the rotary encoder or of the sliding contact device. Thus, for example, the rotary encoder can be arranged at least partially in the second recess and the sliding contact device can be arranged at least partially in the first recess. The reverse is also conceivable.
- In the case that a recess is arranged in the shaft, it can be advantageous for the at least one recess to be arranged on an end of the shaft facing towards or facing away from the crane arm. Thus, the at least one recess can be realized, for example, as a cavity introduced axially into the material of one of the end faces of the shaft.
- It can be advantageous for the rotary encoder and/or the sliding contact device to be substantially completely received in the at least one recess. A space-saving arrangement of the rotary encoder or of the sliding contact device inside the rotational drive and good protection against external mechanical influences can thereby be achieved.
- It can, in principle, be possible for the transmission of the angular position detected by the rotary encoder to a detection device to be effected via cables or wirelessly. The rotary encoder can optionally also be supplied with electricity via cables or wirelessly (for example inductively).
- It can furthermore be advantageous for the current supply line to the sliding contact device to run substantially axially in the shaft and/or to run substantially radially in the shaft bearing, or vice versa. Thus, for example in the case of an arrangement of the sliding contact device in the shaft bearing, the current supply line thereof can run radially (i.e. laterally for example) or axially (i.e. from above for example) in the area of the shaft bearing. In the case of an arrangement of the sliding contact device in or at an end of the shaft, the current supply line thereof can run radially or axially in the area of the shaft bearing and run axially (i.e. along the longitudinal extent of the shaft for example) or radially in the shaft itself.
- It can be advantageous for the current supply line to the sliding contact device to run substantially axially and/or radially in the rotary encoder. In the case of an arrangement of the rotary encoder in or on the shaft bearing or in or on the shaft, the current supply line to the sliding contact device can cross the rotary encoder, wherein this can be effected in the axial and/or radial direction.
- It can, in principle, be advantageous if the shaft projects beyond the shaft bearing at an end of the rotational drive facing towards the load-handling equipment. Securing means for connecting the shaft to the load-handling equipment can thereby be easily reached for example.
- It can furthermore be advantageous for the current discharge line from the sliding contact device to be formed at the end of the rotational drive facing towards the load-handling equipment and preferably to lead away from the rotational drive laterally.
- It can be advantageous for the lateral current discharge line from the sliding contact device to lead away substantially radially or to run diagonally in the direction of the end of the rotational drive facing towards the load-handling equipment.
- It can be provided that the shaft is formed as a rotor and the shaft bearing is formed as a stator. The shaft bearing can thus be formed as non-rotatable relative to the crane arm, and the shaft, and optionally load-handling equipment arranged thereon, can be rotated relative to the fixed shaft bearing.
- It can be advantageous for at least one part of the rotary encoder to be secured to the shaft bearing and at least one part of the rotary encoder to be secured to the shaft. Thus, one part of the rotary encoder can be fixed relative to the shaft bearing and one part of the rotary encoder can be fixed relative to the shaft. Through a rotation of the shaft relative to the shaft bearing, a rotation of the relevant parts of the rotary encoder with respect to each other can thus take place and consequently be detected.
- Protection is also sought for a crane with a hydraulic rotational drive as previously described for rotating load-handling equipment relative to a crane arm, wherein the crane arm is connected to the second securing means of the hydraulic rotational drive.
- Protection is also sought for a harvester, also called a timber harvester, forest harvester or crane harvester, with a crane as previously described.
- Further details and advantages of the present invention are explained in more detail below with the aid of the description of the figures with reference to the embodiment examples represented in the drawings. There are shown in:
-
FIG. 1 a sectional representation of a first embodiment of a rotational drive, -
FIG. 2 a further sectional representation of the embodiment of the rotational drive ofFIG. 1 , -
FIG. 3 a sectional representation of a second embodiment of a rotational drive, -
FIG. 4 a sectional representation of a third embodiment of a rotational drive, -
FIG. 5 a sectional representation of a fourth embodiment of a rotational drive, -
FIG. 6 a sectional representation of a fifth embodiment of a rotational drive, -
FIG. 7 a harvester with a rotational drive, -
FIG. 8 a side view of a crane, -
FIG. 9 a side view of a vehicle with a crane, and -
FIG. 10 a sectional representation of a sixth embodiment of a rotational drive. - A section through a first embodiment of a
rotational drive 1 is shown inFIG. 1 . The lug-type second securing means 6 with which therotational drive 1 can be secured, for example, to a crane arm 3 (not represented here, seeFIG. 7 ) can be seen. Arotatable shaft 4, which hasvanes 7 which can be acted on by hydraulic oil to drive theshaft 4, is arranged in theshaft bearing 18. Theshaft 7 projects out of the shaft bearing 18 at alower end 15 of therotational drive 1. - There is provided in the shaft bearing 18 a
first recess 9, in which arotary encoder 8 is arranged. In the embodiment shown, therotary encoder 8 is arranged substantially completely in thefirst recess 9. Furthermore, in the embodiment shown, thefirst recess 9 is formed substantially between the lug-type second securing means 6. At an (upper as represented) end of theshaft 4 facing towards the second securing means 6, asecond recess 10 is introduced, in which a slidingcontact device 11 is arranged. In the embodiment shown, the slidingcontact device 11 is arranged substantially completely in thesecond recess 10. For guiding signal lines and/or supply lines, corresponding recesses are provided in the shaft bearing 18 as well as in theshaft 4. InFIG. 1 , a recess in the form of thecable duct 20 can be seen in theshaft 4, which, as represented, runs at least in sections substantially axially in theshaft 4. Furthermore, adetection device 14 for the detection of the sensor signals output by therotary encoder 8 is represented schematically inFIG. 1 . The communication between therotary encoder 8 and thedetection device 14, which can be integrated in a crane controller for example, can be effected via cables over asignal line 22 and/or wirelessly via a radio link 23 (such as for instance via Bluetooth, via a radio link according to a standard from the IEEE-802.11 family, or similar). Therotary encoder 8 and thedetection device 14 can have corresponding radio modules. - In the
FIGS. 2 to 6 further embodiments of therotational drive 1 are shown, wherein analogous toFIG. 1 in each case therotary encoder 8 is arranged in arecess 9 in theshaft 18. - A further sectional representation of the embodiment of the
rotational drive 1 shown inFIG. 1 is shown inFIG. 2 . The section plane of the representation shown inFIG. 2 is running substantially rotated by 90° compared withFIG. 1 . Among other things, the recess in the form of thecable duct 19 in the shaft bearing 18, which, as represented, runs substantially radially in the shaft bearing 18, can thereby be seen. - A second embodiment of a
rotational drive 1 is shown inFIG. 3 . In the embodiment shown, the shaft bearing 18 again has afirst recess 9, in which arotary encoder 8 is arranged. At its end facing towards the second securing means 6, theshaft 4 has asecond recess 10, in which a slidingcontact device 11 is arranged. In the embodiment shown inFIG. 2 , thecable duct 19 runs substantially radially in theshaft bearing 18 and also leads substantially radially into therotary encoder 8. Theaxial cable duct 20, which also leads into therotary encoder 8 axially coming from theshaft 4, runs in theshaft 4. Thecurrent supply line 12 to the slidingcontact device 11 thus runs substantially radially in theshaft bearing 18 and in some sections radially and in some sections axially in therotary encoder 8. Thecurrent discharge line 13 runs substantially axially in thecable duct 20 of theshaft 4. At thelower end 15 of therotational drive 1, on theshaft 4 projecting out of the shaft bearing 18, a part of load-handlingequipment 2 secured via first securing means 5 is shown (see alsoFIG. 7 in this regard). Thecurrent discharge line 13 exits the (lower as represented) end of theshaft 4 facing towards the first securing means 5 substantially axially. - A third embodiment of a
rotational drive 1 is shown inFIG. 4 . In the embodiment shown, the shaft bearing 18 again has afirst recess 9, in which arotary encoder 8 is arranged. At its end facing towards the second securing means 6, theshaft 4 has asecond recess 10, in which a slidingcontact device 11 is arranged.FIG. 4 further shows that thecurrent supply line 12 of the slidingcontact device 11 runs substantially radially in theshaft bearing 18 and furthermore crosses therotary encoder 8 axially through a correspondingaxial feedthrough 21. Thecurrent discharge line 13 of the slidingcontact device 11 runs, as represented, substantially axially in theshaft 4 in thecable duct 20. Thecurrent discharge line 13 exits the end of theshaft 4 facing towards the first securing means 5 substantially axially. - In
FIG. 5 , a fourth embodiment of arotational drive 1 is shown, which differs from the embodiment shown inFIG. 3 substantially in that, at an end facing away from the second securing means 6 and facing towards the first securing means 5, theshaft 4 has asecond recess 10, in which the slidingcontact device 11 is arranged. Therotary encoder 8 is again arranged in thefirst recess 9 of theshaft bearing 18. In the embodiment shown inFIG. 5 , thecable duct 19 runs substantially radially in theshaft bearing 18 and also leads substantially radially into therotary encoder 8. Theaxial cable duct 20, which also leads into therotary encoder 8 axially coming from theshaft 4, runs in theshaft 4. Thecurrent supply line 12 to the slidingcontact device 11 thus runs radially in theshaft bearing 18 and in some sections radially and in some sections axially in therotary encoder 8. Thecurrent supply line 12 also runs axially in thecable duct 20 of theshaft 4. Thecurrent discharge line 13 exits the end of theshaft 4 facing towards the first securing means 5 substantially axially. - In
FIG. 6 , a fifth embodiment of arotational drive 1 is shown, which differs from the embodiment shown inFIG. 4 substantially in that, at an end facing away from the second securing means 6 and facing towards the first securing means 5, theshaft 4 has asecond recess 10, in which the slidingcontact device 11 is arranged. As inFIG. 4 , therotary encoder 8 has aradial feedthrough 21. Thecurrent supply line 12 to the slidingcontact device 11, coming from thecable duct 19 running substantially radially through the shaft bearing 18, runs axially through therotary encoder 8 and runs through thecable duct 20 running substantially axially through theshaft 4 to the slidingcontact device 11 arranged, as represented, at the lower end of theshaft 4. Thecurrent discharge line 13 exits the end of theshaft 4 facing towards the first securing means 5 substantially axially. -
FIG. 7 shows a side view of aharvester 17, also called timber harvester, forest harvester or crane harvester. Theharvester 17 has acrane 16 with anexternal crane arm 3. At the crane tip of thecrane arm 3, arotational drive 1 is arranged, to which load-handlingequipment 2 is secured. Through the hydraulicrotational drive 1, the load-handlingequipment 2 can be rotated relative to thecrane arm 3. - In
FIG. 8 , a side view of a further embodiment of acrane 16 is shown, wherein structurally and functionally similar elements have the same reference numbers as in the embodiment shown previously. In the embodiment shown inFIG. 8 , load-handlingequipment 2 formed as a grapple is arranged on atelescopic crane arm 3 via arotational drive 1. - In
FIG. 9 , avehicle 24 with a further embodiment of acrane 16 formed as a loading crane is shown, wherein structurally and functionally similar elements have the same reference numbers as in the embodiments shown previously. Load-handlingequipment 2 formed as a grapple is arranged, via arotational drive 1, on acrane arm 3, formed as an articulated attachment arm, of thecrane 16 arranged on thevehicle 24. - In
FIG. 10 a section through a sixth embodiment of arotational drive 1 is shown. As distinguished from the embodiment shown inFIG. 1 , thefirst recess 9 is provided in theshaft 4, in which therotary encoder 8 is arranged. Thefirst recess 9 is provided at an (upper as represented) end of theshaft 4 facing towards the second securing means 6. In the embodiment shown therotary encoder 8 is provided substantially completely in thefirst recess 9. Below thefirst recess 9 thesecond recess 10 is provided in theshaft 4, in which the slidingcontact device 11 arranged. In the embodiment shown the slidingcontact device 11 is provided substantially completely in thesecond recess 10. -
-
Rotational drive 1 - Load-handling
equipment 2 -
Crane arm 3 -
Shaft 4 - First securing means 5
- Second securing means 6
-
Vane 7 -
Rotary encoder 8 -
First recess 9 -
Second recess 10 - Sliding
contact device 11 -
Current supply line 12 -
Current discharge line 13 -
Detection device 14 - End of
rotational drive 15 -
Crane 16 -
Harvester 17 -
Shaft bearing 18 -
Cable duct 19 -
Cable duct 20 -
Axial feedthrough 21 -
Signal line 22 -
Radio link 23 -
Vehicle 24
Claims (15)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17166255.4 | 2017-04-12 | ||
EP17166255 | 2017-04-12 | ||
EP17166255.4A EP3388385B1 (en) | 2017-04-12 | 2017-04-12 | Rotation drive |
Publications (2)
Publication Number | Publication Date |
---|---|
US20180297823A1 true US20180297823A1 (en) | 2018-10-18 |
US10927863B2 US10927863B2 (en) | 2021-02-23 |
Family
ID=58544847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/950,737 Active US10927863B2 (en) | 2017-04-12 | 2018-04-11 | Hydraulic rotational drive |
Country Status (8)
Country | Link |
---|---|
US (1) | US10927863B2 (en) |
EP (1) | EP3388385B1 (en) |
JP (1) | JP6698734B2 (en) |
KR (1) | KR102094070B1 (en) |
ES (1) | ES2899379T3 (en) |
PL (1) | PL3388385T3 (en) |
RU (1) | RU2709232C2 (en) |
SI (1) | SI3388385T1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD897377S1 (en) * | 2016-05-09 | 2020-09-29 | Indexator Rotator Systems Ab | Rotator |
WO2021206608A1 (en) * | 2020-04-08 | 2021-10-14 | Indexator Rotator Systems Ab | Rotator for a tool |
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EP2460758A1 (en) * | 2010-12-02 | 2012-06-06 | EPSILON Kran GmbH. | Hydraulic rotation drive |
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-
2017
- 2017-04-12 SI SI201731010T patent/SI3388385T1/en unknown
- 2017-04-12 ES ES17166255T patent/ES2899379T3/en active Active
- 2017-04-12 PL PL17166255T patent/PL3388385T3/en unknown
- 2017-04-12 EP EP17166255.4A patent/EP3388385B1/en active Active
-
2018
- 2018-04-11 US US15/950,737 patent/US10927863B2/en active Active
- 2018-04-11 JP JP2018076192A patent/JP6698734B2/en active Active
- 2018-04-11 KR KR1020180042276A patent/KR102094070B1/en active IP Right Grant
- 2018-04-12 RU RU2018113186A patent/RU2709232C2/en active
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JPS6348790A (en) * | 1986-08-11 | 1988-03-01 | チャールズ・エイ・ブロリン | Double induction thermocompression bonding control circuit |
EP2460758A1 (en) * | 2010-12-02 | 2012-06-06 | EPSILON Kran GmbH. | Hydraulic rotation drive |
Cited By (4)
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USD897377S1 (en) * | 2016-05-09 | 2020-09-29 | Indexator Rotator Systems Ab | Rotator |
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WO2021206608A1 (en) * | 2020-04-08 | 2021-10-14 | Indexator Rotator Systems Ab | Rotator for a tool |
Also Published As
Publication number | Publication date |
---|---|
JP6698734B2 (en) | 2020-05-27 |
ES2899379T3 (en) | 2022-03-11 |
RU2018113186A3 (en) | 2019-10-14 |
SI3388385T1 (en) | 2022-01-31 |
BR102018007198A2 (en) | 2019-01-15 |
EP3388385A1 (en) | 2018-10-17 |
KR102094070B1 (en) | 2020-03-27 |
KR20180115231A (en) | 2018-10-22 |
EP3388385B1 (en) | 2021-09-08 |
PL3388385T3 (en) | 2022-01-24 |
RU2018113186A (en) | 2019-10-14 |
US10927863B2 (en) | 2021-02-23 |
RU2709232C2 (en) | 2019-12-18 |
JP2018177531A (en) | 2018-11-15 |
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